The benefits of laughter

The benefits of laughter are impressive. It boosts your immune system,
exercises practically every muscle group, and releases natural pain-relieving
chemicals into your bloodstream. Even a small amount of research into laughter
yields an overwhelming amount of evidence that laughter heals. In fact, even
curving your mouth upward in the semblance of a smile -- no matter how you feel
inside -- stimulates your brain to release healing chemicals into your system.